Performance analysis of diversity techniques in wireless communication (Research Paper Sample)

Performance analysis of diversity techniques in wireless communication
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Date of Submission
Abstract
Diversity techniques refer to very powerful and effective methods utilized in the wireless links to provide an improvement to communications and actually improve their performance against the fading wireless communication channels. The decision on diversity techniques are done by the receiver and may not be known by the transmitter. Therefore, in this paper, the researchers are able to explore different diversity techniques because this assists in evaluating their performance based on their usage. In addition, the researchers describe and analyse various diversity techniques, such as, Maximal Ratio Combining (MRC) and Equal Grain Combining (EGC), and how diversity systems are used for pre-detection combining. In the course of the study, the researchers will simulate all techniques in both Matlab and Lab-view. In addition, the study will derive information from previous statistics of carrier to noise and interference ratio. The assumption is that, Rayleigh fading model will have been examined and measured for diversity systems. The results will demonstrate how fading dynamic range will be reduced drastically when diversity systems are used. In overall, the researchers will conclude that Maximal Ratio Combining (MRC) is a good example of diversity techniques that has achieved a good performance when compared to other techniques. Therefore, diversity techniques have proved to be very vital in improving the performance of the radio channels, in order to, transmit information very effectively and efficiently. However, the limitations considered in this study are not new, but have been organized and analysed appropriately.
Contents
 TOC \o "1-3" \h \z \u  HYPERLINK \l "_Toc375165590"
Abstract  PAGEREF _Toc375165590 \h
2
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Introduction 6
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Diversity 8
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Project Objectives  PAGEREF _Toc375165594 \h
11
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Diversity Techniques  PAGEREF _Toc375165595 \h
11
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Frequency Diversity  PAGEREF _Toc375165596 \h
11
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Time Diversity  PAGEREF _Toc375165597 \h
13
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Space Diversity  PAGEREF _Toc375165598 \h
16
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Background  PAGEREF _Toc375165599 \h
18
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Frequency non-selective fading versus frequency selective fading  PAGEREF _Toc375165600 \h
21
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Fast fading versus slow fading  PAGEREF _Toc375165601 \h
21
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Large scale versus small scale fading  PAGEREF _Toc375165602 \h
23
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Ricean fading versus Rayleigh fading  PAGEREF _Toc375165603 \h
24
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Motivation  PAGEREF _Toc375165604 \h
25
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Co-Channel Interference  PAGEREF _Toc375165605 \h
30
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Channel spreading  PAGEREF _Toc375165606 \h
32
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Channel fading  PAGEREF _Toc375165607 \h
33
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Organization of the study  PAGEREF _Toc375165608 \h
33
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Past/Related Work  PAGEREF _Toc375165609 \h
34
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SISO, SIMO, MISO, MIMO Terminology  PAGEREF _Toc375165610 \h
35
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MIMO - SISO  PAGEREF _Toc375165611 \h
35
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SISO - Single Input Single Output  PAGEREF _Toc375165612 \h
35
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MIMO - SIMO  PAGEREF _Toc375165613 \h
35
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SIMO - Single Input Multiple Output  PAGEREF _Toc375165614 \h
36
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MIMO - MISO  PAGEREF _Toc375165615 \h
37
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MISO - Multiple Input Single Output  PAGEREF _Toc375165616 \h
37
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MIMO  PAGEREF _Toc375165617 \h
37
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MIMO - Multiple Input Multiple Output  PAGEREF _Toc375165618 \h
38
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Project results and analysis  PAGEREF _Toc375165619 \h
38
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Effective Eb/No with MRC  PAGEREF _Toc375165622 \h
41
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Error rate with MRC  PAGEREF _Toc375165623 \h
42
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Selection diversity  PAGEREF _Toc375165628 \h
43
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Outage probability as provided in selection diversity  PAGEREF _Toc375165636 \h
47
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Computing bit error probability with selection diversity  PAGEREF _Toc375165637 \h
49
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BER Simulation Model 50
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Effective Eb/N0 with EGC  PAGEREF _Toc375165646 \h
53
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BER with EGC  PAGEREF _Toc375165647 \h
55
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Diversity Combining Techniques  PAGEREF _Toc375165649 \h
56
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Switched Combining  PAGEREF _Toc375165650 \h
58
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Periodic Switching Method  PAGEREF _Toc375165651 \h
59
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Phase Switching Method 60
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BER for BPSK modulation with Selection diversity in Rayleigh channel  PAGEREF _Toc375165653 \h
61
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Channel Model  PAGEREF _Toc375165654 \h
62
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Computing the probability of error  PAGEREF _Toc375165660 \h
62
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Total probability of bit error  PAGEREF _Toc375165664 \h
63
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The simulation model  PAGEREF _Toc375165665 \h
64
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Bit Error Rate for BPSK in Rayleigh channel  PAGEREF _Toc375165672 \h
65
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System Model  PAGEREF _Toc375165673 \h
66
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Bit Error Rate  PAGEREF _Toc375165674 \h
67
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Probability density function of
 PAGEREF _Toc375165675 \h
68
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Conclusions 70
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References  PAGEREF _Toc375165684 \h
72
List of figures
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Fig 22.............................................